@NoStressyJessie That sounds a whole lot like "I know what the rules are, but I'm ignoring them anyway, because I feel justified". That's not how laws work.
The best way to use a gun is to avoid using it. Don't put yourself in a situation where you feel like you're in danger. That means you probably shouldn't get dinner at the shitty bar that over-serves armed racists. If it's as bad as you're indicating; get the fuck out of there (and report the incident to their management... on the phone, later).
@NoStressyJessie
A gun is not a shield. If you carry one to protect yourself, you have to remember that the only viable method is to shoot to stop someone before they kill you. There's no good version of that.
They don't "get" to terrorize you anymore than you "get" to shoot them. You make it sound like either of these are actively condoned (maybe within the group of assholes, but that can't be 100% of your local population, even in Florida). Patronize business/locales that don't take that shit laying down (and when they do, raise hell with management/corporate/whoever).
As for moving somewhere else? Don't. Stick sound, find like minded people, form a large group, volunteer for the campaign of a better candidate, and help kick that shit stain out of office. He's already fucking up six ways from Sunday, even another Republican (a real one) would be better.
In the meantime, hang out in large groups to out-populate the dickheads at the bar. Go out of your way to make it a place they don't want to be, and let THEM find somewhere else to go. Fuck em.